Grinding wheel dresser



J 1932- R. s. MO CONNELL 1,864,658

GRINDING WHEEL DRESSER Filed April 10, 1931 2 Sheets-Sheet l 1N VENT OR ROBE/FT S. M CUIVIVELL.

JW MW A TTORNE Y June 28, 1932.

R. s. M CONN ELL GRINDING WHEEL DRESSER Filed April 10, 1931 2 Sheets-Sheet 2 ATTORNEY shown in Figure 4.

Patented June 28, 1932 UNITED STATES,

ROBERT S. MCCONNELL, OF 'U RBANA, OHJ IO,

AssIGnoR T GEORGE mccoNn'ELL, DOING BUSINESS AS THE DIESMOND-STEPH AN" MFG. 00., OF. URBANA, OHIO GRINDING WHEEL DRESSER Application filed Ap ri1-10,

This invention relates to grinding wheel dressers, and has for its object to provide a tool that has a looped spring handle, in the free ends of which is located an axle.

It is particularly the object of this invention to provide, inconnection with the resilient handle, axle means for supporting between the ends of the handle, which is in the form of a loop, one or more discs which have on the peripheries thereofteeth.

These discs are made of hard steel and are adapted to be held against the surface of a grinding stone or emery wheel to remove the uneven parts therefrom so the periphery of the wheel will present a flat surface about a common axis of rotation. It frequently happens in the use of grinding wheels that some parts become worn away more than other parts so that the peripheries of the wheels become uneven. It is the purpose of this tool to remove the unevenness from the periphery of the wheel.

It is also an object of this invention to provide, in connection with the resilient handle adapted to carry a plurality of toothed wheels, discs to space the wheels and hold them one from the other.

These and other advantages will appear 7 from the following description taken in connection with the drawings, which show a preferred embodiment of this invention.

Referring to the drawings:

Figure 1 is a top plan view showing the looped handle, having between the free ends thereof a single rotating toothed disc.

Figure 2 is a side elevation of the tool shown in Figure 1.

Figure 3 is a longitudinal section through the handle showing the axle for supporting the disc.

Figure 4 is a top plan view of the tool, in which there are three toothed wheels spaced one from another by discs.

Figure 5 is aside elevation of the tool as Figure 6 is a longitudinal section through the tool shown in Figures 4: and 5, showing the form of axle for supporting a plurality of toothed discs with spacing discs between the toothed discs.

1931. Serial No. 529,029.

Figure 7 is a top plan view of a slightly modified form in which theloop forming the handle has no enlargements v Figure 8 is a side elevation of the tool as shown in Figure '7.

F 'gure 9 isalongitudinal section of: the

tool. shown in Figures 7 and 8-, I

Figurev 10is a top plan view of the showing a plurality of cuttin discs sup.-

.ported-betweenthe free ends 0 the handle. Figure 11 is a side elevation of the tool as shown in Figure 10. V V J;

Figure 12 is, a longitudinal-section through the form ofgtoolshownin Figures 10'and 11. Figure 13 shows a slightlymodified form of handle in which each end has; aplurality of axle-receiving holes.

pAny suitable form of handle may used,

but in the present instance the handle is shownformedof a single piece of metal,-bent in the formnof a loop 1. In the free ends of this loop are holes 3. Between the ends of the handle there is an enlarged part which terminates, in parts 2 that are substantially parallelcwith each other, andbetween which the cutting ortoothed discs are located.

In the holes 3inthe free ends of the handle is an axle 4, which has on each end a reduced part 5 for fitting in the holes in the free ends of the. handle. In theform shown in Figures 1, 2 and 8 the axle is short and isa'daptedto supportthereon, between the parts 2-01? the handle, a single cutting disc or wheel 6. This wheel rotates on the large or central part of the hub, and has. therethrough a hole 7 for receiving the large part of'the axle. The teeth:on the periphery of the cutting disc or wheel are indicated by the numeral 8. f j c When a single disc is used on the short axle there. are no spacers provided, but when two or'more of these toothed/discs are vused a spacing disc 9 may be located between the two adjacent toothed .discs. In the form shown in Figuresfl, 5 and 6. there are three discslocated on a relatively long axle, with the reduced parts of the. axle in-the parts 2 offthe handle. The discs 9 are ofsubstantially the same, diameter as the toothed discs so that the peripheries of these discs liesubs thefree ends of the handle. In this form the the toothed discs. This is illustrated in all of Figures 4, 5 and 6.

The same handle is used for one or a plurality of cutting discs. The handle being made of resilient metal, can be spread apart so it may receive between the ends 2 either a short or a long axle. In both cases the handle abuts the shoulders formed'by the reduced part on the ends of the axle.

When it is desired to make even and smooth the periphery of a grinding wheel the toothed wheel or wheels are held against the periphery of the wheel as it rotates so that-the un even parts are cut. down and made of the same diameter that theotheri'parts' are. This tool is also useful for removing from the outer periphery of a grinding wheel the smooth and polished surface so that a cutting surface is restored. It frequently happens, after emery and grinding wheels haveibeen used,

that the peripheries become smooth andineffective for grinding purposes. this tool the surface may be cut oil so that the By using smoothness and glaze appearance is removed and a cutting edge restored.

In Figures 7 to 12, inclusive, there is shown a tool in which the axle has nowduced part and the central hole within each toothed disc is the same size as the axle, which is also the same size as the hole 3 in handle 10 is plain without any bulge adjacent the part 2 so that it is substantially the shape of a U, with the free ends bent toward each other.

The hole in the free end of each arm of the handle is indicated by the numeral 11 and the axle'which fits in these holes and supports the rotating toothed disc is indicated by the numeral 12. This handle supports the toothed wheels in the'same mannerthat they are supported in the form shown in Figures 1 to 6, inclusive, the difi'erence being that there are no reduced ends on the axle and there are no lateral extensions on the handle,

- but there are loops 13 to hold the axle in the holes-in the handle. I

In Figure 13 there is shown a handle similar to that shown in Figure 1, except that the parallel parts are longer and provide space for two or more axle holes inwhich the axle 4 fits. The purpose of this modification is to provide a handle with the parallel ends sufficiently long that when the ends become worn they may be. ground off along the line 2a between the two holes 3 on each'end of the handle. The extension part outside of the line 2a" is indicated by the numeral 2?), which is the part out off after it becomes too much worn so that the handle presentsan unused appearance.

I desire to comprehend within my invention suchmodifications as may be embraced :vithin my claim and the scope of my inventoothed'zmember; Y

toothed cutting membersfixedto said axle and projecting therefrom, and spacers of substantially the same diameter as the toothed members positioned between each adjacent In testimony whereof, I alfix my signature.

RQBERT S. MOCON N ELL. 

